Customer support in English
You can inquire in English regarding purchasing AHS products at AHS store.
Email address is on Purchase Guide.
For technical support regarding use of VOCALOID voice libraries from AHS, please contact us at the same Email address.
For technical support regarding use of VOCALOID Editor, please contact YAMAHA.http://www.vocaloid.com/en/support/

System Requirements
Here are the system requirements for VOCALOID4 voice library.

System requirements are rough standard. It does not mean we guarantee the compatibility of all the machines that meet these requirements.
Performance depends on the overall capability of your machine and the functions you use in the program.

Please make sure to check if your system meets the requirements before purchase.
We cannot not refund for your not checking these requirements beforehand.
Also trial version of this product is available down below on this page.
We recommend that you try it before purchase.

・VOCALOID4 miki trial version（in Japanese Only）http://www.ah-soft.com/trial/vocaloid4_miki.html
After clicking this link, it jumps to a page of EULA(sorry in Japanese only).
If you agree, check the box at the bottom and click the grey button.
And Then it jumps to the a page of warnings (sorry in Japanese only).
At the bottom below the character picture, there is a button to download the trial version program.